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| pressure regulating valve | |||
| pressure relief valve (①在气动和氧气系统中，确保空气或氧气的压力在进人工作系统后降低到恰当值的阀门；②如果压力上升到预定值以上，能使液体返回到蓄油箱或歧管中的阀门) | |||
| pressure relief valve; pressure reducing valve; relief valve | |||
| pressure regulator; pressure-relief valve; pressure-relief regulator | |||
| 减压安全阀: 3 phrases in 2 subjects |
| Automobiles | 1 |
| Technology | 2 |